package com.tpsix.util;


import lombok.experimental.UtilityClass;


@UtilityClass
public class StrUtil extends cn.hutool.core.util.StrUtil {

    public final char C_EMAIL  = '@';

    public final char C_AREA = '区';


    /**
     * 首字母小写
     * @param str 字符串
     * @return 首字母小写后的字符串
     */
    public String toLowerCaseFirstOne(String str) {
        char[] chars = str.toCharArray();
        chars[0] += 32;
        return String.valueOf(chars);
    }

}
